/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/mcr/example_4.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 13:30:06,566 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 13:30:06,569 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 13:30:06,600 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 13:30:06,647 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf [2021-06-05 13:30:06,676 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 13:30:06,676 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 13:30:06,677 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 13:30:06,677 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 13:30:06,679 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 13:30:06,679 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 13:30:06,679 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 13:30:06,679 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 13:30:06,679 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 13:30:06,679 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 13:30:06,680 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 13:30:06,680 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 13:30:06,680 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 13:30:06,680 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 13:30:06,680 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 13:30:06,680 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 13:30:06,680 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 13:30:06,680 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 13:30:06,681 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 13:30:06,681 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 13:30:06,681 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 13:30:06,681 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 13:30:06,681 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 13:30:06,681 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 13:30:06,681 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 13:30:06,681 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 13:30:06,681 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 13:30:06,681 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 13:30:06,681 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 13:30:06,682 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 13:30:06,682 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 13:30:06,682 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-06-05 13:30:06,682 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 13:30:06,925 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 13:30:06,938 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 13:30:06,940 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 13:30:06,940 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 13:30:06,941 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 13:30:06,942 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/mcr/example_4.bpl [2021-06-05 13:30:06,942 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/mcr/example_4.bpl' [2021-06-05 13:30:06,977 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 13:30:06,978 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 13:30:06,979 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 13:30:06,979 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 13:30:06,979 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 13:30:06,988 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:30:06" (1/1) ... [2021-06-05 13:30:06,994 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:30:06" (1/1) ... [2021-06-05 13:30:06,999 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 13:30:07,001 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 13:30:07,002 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 13:30:07,002 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 13:30:07,007 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:30:06" (1/1) ... [2021-06-05 13:30:07,007 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:30:06" (1/1) ... [2021-06-05 13:30:07,008 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:30:06" (1/1) ... [2021-06-05 13:30:07,008 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:30:06" (1/1) ... [2021-06-05 13:30:07,010 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:30:06" (1/1) ... [2021-06-05 13:30:07,011 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:30:06" (1/1) ... [2021-06-05 13:30:07,011 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:30:06" (1/1) ... [2021-06-05 13:30:07,012 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 13:30:07,013 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 13:30:07,013 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 13:30:07,015 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 13:30:07,016 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:30:06" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 13:30:07,093 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_1 given in one single declaration [2021-06-05 13:30:07,102 INFO L130 BoogieDeclarations]: Found specification of procedure set_1 [2021-06-05 13:30:07,102 INFO L138 BoogieDeclarations]: Found implementation of procedure set_1 [2021-06-05 13:30:07,102 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_2 given in one single declaration [2021-06-05 13:30:07,102 INFO L130 BoogieDeclarations]: Found specification of procedure set_2 [2021-06-05 13:30:07,103 INFO L138 BoogieDeclarations]: Found implementation of procedure set_2 [2021-06-05 13:30:07,103 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_3 given in one single declaration [2021-06-05 13:30:07,103 INFO L130 BoogieDeclarations]: Found specification of procedure set_3 [2021-06-05 13:30:07,103 INFO L138 BoogieDeclarations]: Found implementation of procedure set_3 [2021-06-05 13:30:07,103 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_0 given in one single declaration [2021-06-05 13:30:07,103 INFO L130 BoogieDeclarations]: Found specification of procedure set_0 [2021-06-05 13:30:07,103 INFO L138 BoogieDeclarations]: Found implementation of procedure set_0 [2021-06-05 13:30:07,103 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 13:30:07,103 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 13:30:07,104 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 13:30:07,104 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 13:30:07,234 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 13:30:07,234 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 13:30:07,235 INFO L202 PluginConnector]: Adding new model example_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 01:30:07 BoogieIcfgContainer [2021-06-05 13:30:07,235 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 13:30:07,236 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 13:30:07,236 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 13:30:07,238 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 13:30:07,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "example_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:30:06" (1/2) ... [2021-06-05 13:30:07,239 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16414588 and model type example_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 01:30:07, skipping insertion in model container [2021-06-05 13:30:07,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "example_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 01:30:07" (2/2) ... [2021-06-05 13:30:07,240 INFO L111 eAbstractionObserver]: Analyzing ICFG example_4.bpl [2021-06-05 13:30:07,260 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 13:30:07,260 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 13:30:07,260 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 13:30:07,261 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 13:30:07,328 INFO L149 ThreadInstanceAdder]: Constructed 16 joinOtherThreadTransitions. [2021-06-05 13:30:07,343 INFO L255 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-06-05 13:30:07,356 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 13:30:07,356 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 13:30:07,356 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 13:30:07,356 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 13:30:07,357 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 13:30:07,357 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 13:30:07,357 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 13:30:07,357 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 13:30:07,363 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 35 transitions, 138 flow [2021-06-05 13:30:07,422 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 299 states, 297 states have (on average 2.95959595959596) internal successors, (879), 298 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:30:07,425 INFO L276 IsEmpty]: Start isEmpty. Operand has 299 states, 297 states have (on average 2.95959595959596) internal successors, (879), 298 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:30:07,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:30:07,435 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:30:07,436 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:30:07,436 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:30:07,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:30:07,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1503386291, now seen corresponding path program 1 times [2021-06-05 13:30:07,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:30:07,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180597807] [2021-06-05 13:30:07,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:30:07,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:30:07,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:30:07,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:30:07,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180597807] [2021-06-05 13:30:07,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180597807] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:30:07,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:30:07,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 13:30:07,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645717040] [2021-06-05 13:30:07,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 13:30:07,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:30:07,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 13:30:07,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 13:30:07,587 INFO L87 Difference]: Start difference. First operand has 299 states, 297 states have (on average 2.95959595959596) internal successors, (879), 298 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:30:07,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:30:07,625 INFO L93 Difference]: Finished difference Result 272 states and 771 transitions. [2021-06-05 13:30:07,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 13:30:07,627 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 13:30:07,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:30:07,641 INFO L225 Difference]: With dead ends: 272 [2021-06-05 13:30:07,641 INFO L226 Difference]: Without dead ends: 270 [2021-06-05 13:30:07,642 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 13:30:07,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-06-05 13:30:07,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 270. [2021-06-05 13:30:07,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 2.858736059479554) internal successors, (769), 269 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:30:07,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 769 transitions. [2021-06-05 13:30:07,704 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 769 transitions. Word has length 17 [2021-06-05 13:30:07,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:30:07,705 INFO L482 AbstractCegarLoop]: Abstraction has 270 states and 769 transitions. [2021-06-05 13:30:07,705 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:30:07,705 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 769 transitions. [2021-06-05 13:30:07,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:30:07,707 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:30:07,707 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:30:07,707 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 13:30:07,707 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:30:07,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:30:07,708 INFO L82 PathProgramCache]: Analyzing trace with hash 591735021, now seen corresponding path program 1 times [2021-06-05 13:30:07,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:30:07,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962316522] [2021-06-05 13:30:07,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:30:07,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:30:07,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:30:07,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:30:07,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962316522] [2021-06-05 13:30:07,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962316522] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:30:07,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:30:07,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 13:30:07,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395882803] [2021-06-05 13:30:07,745 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 13:30:07,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:30:07,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 13:30:07,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 13:30:07,746 INFO L87 Difference]: Start difference. First operand 270 states and 769 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:30:07,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:30:07,759 INFO L93 Difference]: Finished difference Result 216 states and 589 transitions. [2021-06-05 13:30:07,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 13:30:07,759 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 13:30:07,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:30:07,761 INFO L225 Difference]: With dead ends: 216 [2021-06-05 13:30:07,761 INFO L226 Difference]: Without dead ends: 216 [2021-06-05 13:30:07,761 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 13:30:07,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-06-05 13:30:07,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2021-06-05 13:30:07,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.73953488372093) internal successors, (589), 215 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:30:07,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 589 transitions. [2021-06-05 13:30:07,769 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 589 transitions. Word has length 17 [2021-06-05 13:30:07,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:30:07,769 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 589 transitions. [2021-06-05 13:30:07,769 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:30:07,769 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 589 transitions. [2021-06-05 13:30:07,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:30:07,771 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:30:07,771 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:30:07,771 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 13:30:07,771 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:30:07,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:30:07,772 INFO L82 PathProgramCache]: Analyzing trace with hash -345548245, now seen corresponding path program 1 times [2021-06-05 13:30:07,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:30:07,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909777382] [2021-06-05 13:30:07,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:30:07,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:30:07,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:30:07,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:30:07,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909777382] [2021-06-05 13:30:07,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909777382] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:30:07,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:30:07,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 13:30:07,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410838689] [2021-06-05 13:30:07,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 13:30:07,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:30:07,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 13:30:07,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 13:30:07,818 INFO L87 Difference]: Start difference. First operand 216 states and 589 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:30:07,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:30:07,835 INFO L93 Difference]: Finished difference Result 162 states and 433 transitions. [2021-06-05 13:30:07,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 13:30:07,838 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 13:30:07,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:30:07,839 INFO L225 Difference]: With dead ends: 162 [2021-06-05 13:30:07,839 INFO L226 Difference]: Without dead ends: 162 [2021-06-05 13:30:07,840 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 13:30:07,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-06-05 13:30:07,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2021-06-05 13:30:07,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 2.68944099378882) internal successors, (433), 161 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:30:07,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 433 transitions. [2021-06-05 13:30:07,846 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 433 transitions. Word has length 17 [2021-06-05 13:30:07,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:30:07,846 INFO L482 AbstractCegarLoop]: Abstraction has 162 states and 433 transitions. [2021-06-05 13:30:07,846 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:30:07,846 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 433 transitions. [2021-06-05 13:30:07,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:30:07,847 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:30:07,847 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:30:07,847 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 13:30:07,847 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:30:07,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:30:07,848 INFO L82 PathProgramCache]: Analyzing trace with hash -1896362483, now seen corresponding path program 1 times [2021-06-05 13:30:07,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:30:07,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290507489] [2021-06-05 13:30:07,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:30:07,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:30:08,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:30:08,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:30:08,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290507489] [2021-06-05 13:30:08,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290507489] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:30:08,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:30:08,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 13:30:08,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616651614] [2021-06-05 13:30:08,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 13:30:08,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:30:08,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 13:30:08,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 13:30:08,027 INFO L87 Difference]: Start difference. First operand 162 states and 433 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:30:08,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:30:08,101 INFO L93 Difference]: Finished difference Result 304 states and 750 transitions. [2021-06-05 13:30:08,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 13:30:08,102 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 13:30:08,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:30:08,103 INFO L225 Difference]: With dead ends: 304 [2021-06-05 13:30:08,103 INFO L226 Difference]: Without dead ends: 265 [2021-06-05 13:30:08,103 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 76.0ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:30:08,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-06-05 13:30:08,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 170. [2021-06-05 13:30:08,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.6804733727810652) internal successors, (453), 169 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:30:08,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 453 transitions. [2021-06-05 13:30:08,110 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 453 transitions. Word has length 17 [2021-06-05 13:30:08,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:30:08,111 INFO L482 AbstractCegarLoop]: Abstraction has 170 states and 453 transitions. [2021-06-05 13:30:08,111 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:30:08,111 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 453 transitions. [2021-06-05 13:30:08,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:30:08,112 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:30:08,112 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:30:08,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 13:30:08,112 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:30:08,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:30:08,113 INFO L82 PathProgramCache]: Analyzing trace with hash 448349167, now seen corresponding path program 2 times [2021-06-05 13:30:08,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:30:08,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910934291] [2021-06-05 13:30:08,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:30:08,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:30:08,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:30:08,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:30:08,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910934291] [2021-06-05 13:30:08,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910934291] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:30:08,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:30:08,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 13:30:08,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535456073] [2021-06-05 13:30:08,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 13:30:08,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:30:08,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 13:30:08,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 13:30:08,249 INFO L87 Difference]: Start difference. First operand 170 states and 453 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:30:08,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:30:08,285 INFO L93 Difference]: Finished difference Result 319 states and 785 transitions. [2021-06-05 13:30:08,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 13:30:08,285 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 13:30:08,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:30:08,287 INFO L225 Difference]: With dead ends: 319 [2021-06-05 13:30:08,287 INFO L226 Difference]: Without dead ends: 257 [2021-06-05 13:30:08,287 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 67.8ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:30:08,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-06-05 13:30:08,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 162. [2021-06-05 13:30:08,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 2.6645962732919255) internal successors, (429), 161 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:30:08,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 429 transitions. [2021-06-05 13:30:08,297 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 429 transitions. Word has length 17 [2021-06-05 13:30:08,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:30:08,298 INFO L482 AbstractCegarLoop]: Abstraction has 162 states and 429 transitions. [2021-06-05 13:30:08,298 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:30:08,298 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 429 transitions. [2021-06-05 13:30:08,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:30:08,300 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:30:08,300 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:30:08,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 13:30:08,300 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:30:08,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:30:08,301 INFO L82 PathProgramCache]: Analyzing trace with hash 808670063, now seen corresponding path program 3 times [2021-06-05 13:30:08,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:30:08,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283272950] [2021-06-05 13:30:08,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:30:08,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:30:08,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:30:08,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:30:08,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283272950] [2021-06-05 13:30:08,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283272950] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:30:08,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:30:08,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 13:30:08,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090523586] [2021-06-05 13:30:08,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 13:30:08,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:30:08,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 13:30:08,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 13:30:08,418 INFO L87 Difference]: Start difference. First operand 162 states and 429 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:30:08,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:30:08,490 INFO L93 Difference]: Finished difference Result 291 states and 712 transitions. [2021-06-05 13:30:08,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 13:30:08,491 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 13:30:08,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:30:08,492 INFO L225 Difference]: With dead ends: 291 [2021-06-05 13:30:08,493 INFO L226 Difference]: Without dead ends: 252 [2021-06-05 13:30:08,493 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 85.4ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:30:08,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-06-05 13:30:08,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 166. [2021-06-05 13:30:08,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 2.6484848484848484) internal successors, (437), 165 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:30:08,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 437 transitions. [2021-06-05 13:30:08,503 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 437 transitions. Word has length 17 [2021-06-05 13:30:08,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:30:08,507 INFO L482 AbstractCegarLoop]: Abstraction has 166 states and 437 transitions. [2021-06-05 13:30:08,507 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:30:08,507 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 437 transitions. [2021-06-05 13:30:08,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:30:08,508 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:30:08,508 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:30:08,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-05 13:30:08,508 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:30:08,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:30:08,508 INFO L82 PathProgramCache]: Analyzing trace with hash -209274001, now seen corresponding path program 4 times [2021-06-05 13:30:08,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:30:08,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488118628] [2021-06-05 13:30:08,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:30:08,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:30:08,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:30:08,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:30:08,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488118628] [2021-06-05 13:30:08,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488118628] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:30:08,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:30:08,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 13:30:08,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766698455] [2021-06-05 13:30:08,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 13:30:08,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:30:08,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 13:30:08,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 13:30:08,575 INFO L87 Difference]: Start difference. First operand 166 states and 437 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:30:08,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:30:08,613 INFO L93 Difference]: Finished difference Result 297 states and 725 transitions. [2021-06-05 13:30:08,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 13:30:08,614 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 13:30:08,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:30:08,615 INFO L225 Difference]: With dead ends: 297 [2021-06-05 13:30:08,615 INFO L226 Difference]: Without dead ends: 248 [2021-06-05 13:30:08,615 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 50.0ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:30:08,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-06-05 13:30:08,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 162. [2021-06-05 13:30:08,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 2.652173913043478) internal successors, (427), 161 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:30:08,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 427 transitions. [2021-06-05 13:30:08,620 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 427 transitions. Word has length 17 [2021-06-05 13:30:08,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:30:08,620 INFO L482 AbstractCegarLoop]: Abstraction has 162 states and 427 transitions. [2021-06-05 13:30:08,620 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:30:08,620 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 427 transitions. [2021-06-05 13:30:08,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:30:08,620 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:30:08,620 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:30:08,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-05 13:30:08,621 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:30:08,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:30:08,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1120579375, now seen corresponding path program 5 times [2021-06-05 13:30:08,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:30:08,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247227897] [2021-06-05 13:30:08,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:30:08,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:30:08,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:30:08,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:30:08,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247227897] [2021-06-05 13:30:08,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247227897] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:30:08,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:30:08,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 13:30:08,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512167970] [2021-06-05 13:30:08,701 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 13:30:08,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:30:08,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 13:30:08,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 13:30:08,702 INFO L87 Difference]: Start difference. First operand 162 states and 427 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:30:08,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:30:08,729 INFO L93 Difference]: Finished difference Result 332 states and 818 transitions. [2021-06-05 13:30:08,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 13:30:08,729 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 13:30:08,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:30:08,730 INFO L225 Difference]: With dead ends: 332 [2021-06-05 13:30:08,730 INFO L226 Difference]: Without dead ends: 278 [2021-06-05 13:30:08,731 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 43.0ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:30:08,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-06-05 13:30:08,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 177. [2021-06-05 13:30:08,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.602272727272727) internal successors, (458), 176 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:30:08,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 458 transitions. [2021-06-05 13:30:08,737 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 458 transitions. Word has length 17 [2021-06-05 13:30:08,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:30:08,737 INFO L482 AbstractCegarLoop]: Abstraction has 177 states and 458 transitions. [2021-06-05 13:30:08,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:30:08,737 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 458 transitions. [2021-06-05 13:30:08,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:30:08,738 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:30:08,738 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:30:08,738 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-05 13:30:08,738 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:30:08,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:30:08,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1448962257, now seen corresponding path program 6 times [2021-06-05 13:30:08,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:30:08,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799285273] [2021-06-05 13:30:08,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:30:08,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:30:08,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:30:08,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:30:08,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799285273] [2021-06-05 13:30:08,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799285273] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:30:08,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:30:08,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 13:30:08,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191302876] [2021-06-05 13:30:08,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 13:30:08,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:30:08,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 13:30:08,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 13:30:08,786 INFO L87 Difference]: Start difference. First operand 177 states and 458 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:30:08,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:30:08,820 INFO L93 Difference]: Finished difference Result 323 states and 785 transitions. [2021-06-05 13:30:08,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 13:30:08,821 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 13:30:08,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:30:08,822 INFO L225 Difference]: With dead ends: 323 [2021-06-05 13:30:08,822 INFO L226 Difference]: Without dead ends: 257 [2021-06-05 13:30:08,822 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 43.9ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:30:08,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-06-05 13:30:08,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 156. [2021-06-05 13:30:08,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.6516129032258067) internal successors, (411), 155 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:30:08,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 411 transitions. [2021-06-05 13:30:08,826 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 411 transitions. Word has length 17 [2021-06-05 13:30:08,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:30:08,826 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 411 transitions. [2021-06-05 13:30:08,827 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:30:08,827 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 411 transitions. [2021-06-05 13:30:08,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:30:08,827 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:30:08,827 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:30:08,827 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-06-05 13:30:08,827 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:30:08,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:30:08,828 INFO L82 PathProgramCache]: Analyzing trace with hash -815299857, now seen corresponding path program 7 times [2021-06-05 13:30:08,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:30:08,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103592159] [2021-06-05 13:30:08,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:30:08,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:30:08,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:30:08,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:30:08,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103592159] [2021-06-05 13:30:08,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103592159] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:30:08,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:30:08,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 13:30:08,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494761113] [2021-06-05 13:30:08,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 13:30:08,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:30:08,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 13:30:08,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 13:30:08,892 INFO L87 Difference]: Start difference. First operand 156 states and 411 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:30:08,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:30:08,921 INFO L93 Difference]: Finished difference Result 290 states and 704 transitions. [2021-06-05 13:30:08,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 13:30:08,922 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 13:30:08,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:30:08,923 INFO L225 Difference]: With dead ends: 290 [2021-06-05 13:30:08,923 INFO L226 Difference]: Without dead ends: 251 [2021-06-05 13:30:08,923 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 58.4ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:30:08,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-06-05 13:30:08,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 156. [2021-06-05 13:30:08,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.6258064516129034) internal successors, (407), 155 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:30:08,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 407 transitions. [2021-06-05 13:30:08,927 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 407 transitions. Word has length 17 [2021-06-05 13:30:08,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:30:08,927 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 407 transitions. [2021-06-05 13:30:08,927 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:30:08,927 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 407 transitions. [2021-06-05 13:30:08,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:30:08,928 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:30:08,928 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:30:08,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-06-05 13:30:08,928 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:30:08,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:30:08,928 INFO L82 PathProgramCache]: Analyzing trace with hash 1529411793, now seen corresponding path program 8 times [2021-06-05 13:30:08,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:30:08,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391010992] [2021-06-05 13:30:08,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:30:08,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:30:08,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:30:08,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:30:08,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391010992] [2021-06-05 13:30:08,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391010992] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:30:08,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:30:08,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 13:30:08,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774551016] [2021-06-05 13:30:08,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 13:30:08,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:30:08,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 13:30:08,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 13:30:08,995 INFO L87 Difference]: Start difference. First operand 156 states and 407 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:30:09,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:30:09,020 INFO L93 Difference]: Finished difference Result 305 states and 739 transitions. [2021-06-05 13:30:09,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 13:30:09,021 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 13:30:09,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:30:09,022 INFO L225 Difference]: With dead ends: 305 [2021-06-05 13:30:09,022 INFO L226 Difference]: Without dead ends: 243 [2021-06-05 13:30:09,022 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 46.2ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:30:09,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-06-05 13:30:09,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 148. [2021-06-05 13:30:09,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.6054421768707483) internal successors, (383), 147 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:30:09,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 383 transitions. [2021-06-05 13:30:09,026 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 383 transitions. Word has length 17 [2021-06-05 13:30:09,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:30:09,026 INFO L482 AbstractCegarLoop]: Abstraction has 148 states and 383 transitions. [2021-06-05 13:30:09,026 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:30:09,026 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 383 transitions. [2021-06-05 13:30:09,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:30:09,026 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:30:09,027 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:30:09,027 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-06-05 13:30:09,027 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:30:09,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:30:09,027 INFO L82 PathProgramCache]: Analyzing trace with hash 192998127, now seen corresponding path program 9 times [2021-06-05 13:30:09,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:30:09,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609598011] [2021-06-05 13:30:09,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:30:09,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:30:09,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:30:09,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:30:09,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609598011] [2021-06-05 13:30:09,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609598011] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:30:09,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:30:09,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 13:30:09,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664978678] [2021-06-05 13:30:09,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 13:30:09,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:30:09,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 13:30:09,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 13:30:09,093 INFO L87 Difference]: Start difference. First operand 148 states and 383 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:30:09,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:30:09,123 INFO L93 Difference]: Finished difference Result 267 states and 641 transitions. [2021-06-05 13:30:09,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 13:30:09,123 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 13:30:09,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:30:09,124 INFO L225 Difference]: With dead ends: 267 [2021-06-05 13:30:09,125 INFO L226 Difference]: Without dead ends: 228 [2021-06-05 13:30:09,125 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 45.9ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:30:09,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-06-05 13:30:09,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 152. [2021-06-05 13:30:09,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.589403973509934) internal successors, (391), 151 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:30:09,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 391 transitions. [2021-06-05 13:30:09,129 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 391 transitions. Word has length 17 [2021-06-05 13:30:09,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:30:09,129 INFO L482 AbstractCegarLoop]: Abstraction has 152 states and 391 transitions. [2021-06-05 13:30:09,129 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:30:09,129 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 391 transitions. [2021-06-05 13:30:09,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:30:09,130 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:30:09,130 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:30:09,130 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-06-05 13:30:09,130 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:30:09,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:30:09,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1503575313, now seen corresponding path program 10 times [2021-06-05 13:30:09,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:30:09,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700873901] [2021-06-05 13:30:09,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:30:09,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:30:09,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:30:09,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:30:09,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700873901] [2021-06-05 13:30:09,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700873901] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:30:09,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:30:09,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 13:30:09,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658358098] [2021-06-05 13:30:09,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 13:30:09,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:30:09,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 13:30:09,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 13:30:09,178 INFO L87 Difference]: Start difference. First operand 152 states and 391 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:30:09,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:30:09,212 INFO L93 Difference]: Finished difference Result 239 states and 584 transitions. [2021-06-05 13:30:09,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 13:30:09,212 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 13:30:09,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:30:09,213 INFO L225 Difference]: With dead ends: 239 [2021-06-05 13:30:09,213 INFO L226 Difference]: Without dead ends: 192 [2021-06-05 13:30:09,213 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 49.6ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:30:09,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-06-05 13:30:09,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 148. [2021-06-05 13:30:09,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.5918367346938775) internal successors, (381), 147 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:30:09,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 381 transitions. [2021-06-05 13:30:09,217 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 381 transitions. Word has length 17 [2021-06-05 13:30:09,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:30:09,217 INFO L482 AbstractCegarLoop]: Abstraction has 148 states and 381 transitions. [2021-06-05 13:30:09,218 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:30:09,218 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 381 transitions. [2021-06-05 13:30:09,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:30:09,218 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:30:09,218 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:30:09,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-06-05 13:30:09,218 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:30:09,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:30:09,219 INFO L82 PathProgramCache]: Analyzing trace with hash -1736251311, now seen corresponding path program 11 times [2021-06-05 13:30:09,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:30:09,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255602727] [2021-06-05 13:30:09,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:30:09,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:30:09,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:30:09,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:30:09,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255602727] [2021-06-05 13:30:09,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255602727] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:30:09,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:30:09,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 13:30:09,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651086196] [2021-06-05 13:30:09,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 13:30:09,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:30:09,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 13:30:09,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 13:30:09,272 INFO L87 Difference]: Start difference. First operand 148 states and 381 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:30:09,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:30:09,299 INFO L93 Difference]: Finished difference Result 288 states and 697 transitions. [2021-06-05 13:30:09,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 13:30:09,299 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 13:30:09,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:30:09,300 INFO L225 Difference]: With dead ends: 288 [2021-06-05 13:30:09,301 INFO L226 Difference]: Without dead ends: 234 [2021-06-05 13:30:09,301 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 51.0ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:30:09,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-06-05 13:30:09,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 158. [2021-06-05 13:30:09,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.5605095541401273) internal successors, (402), 157 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:30:09,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 402 transitions. [2021-06-05 13:30:09,305 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 402 transitions. Word has length 17 [2021-06-05 13:30:09,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:30:09,305 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 402 transitions. [2021-06-05 13:30:09,305 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:30:09,305 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 402 transitions. [2021-06-05 13:30:09,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:30:09,306 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:30:09,306 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:30:09,306 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-06-05 13:30:09,306 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:30:09,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:30:09,306 INFO L82 PathProgramCache]: Analyzing trace with hash -1648314577, now seen corresponding path program 12 times [2021-06-05 13:30:09,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:30:09,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476320313] [2021-06-05 13:30:09,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:30:09,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:30:09,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:30:09,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:30:09,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476320313] [2021-06-05 13:30:09,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476320313] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:30:09,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:30:09,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 13:30:09,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62733747] [2021-06-05 13:30:09,364 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 13:30:09,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:30:09,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 13:30:09,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 13:30:09,364 INFO L87 Difference]: Start difference. First operand 158 states and 402 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:30:09,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:30:09,394 INFO L93 Difference]: Finished difference Result 245 states and 595 transitions. [2021-06-05 13:30:09,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 13:30:09,395 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 13:30:09,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:30:09,396 INFO L225 Difference]: With dead ends: 245 [2021-06-05 13:30:09,396 INFO L226 Difference]: Without dead ends: 188 [2021-06-05 13:30:09,396 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 56.0ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:30:09,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-06-05 13:30:09,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 144. [2021-06-05 13:30:09,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.5944055944055946) internal successors, (371), 143 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:30:09,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 371 transitions. [2021-06-05 13:30:09,399 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 371 transitions. Word has length 17 [2021-06-05 13:30:09,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:30:09,399 INFO L482 AbstractCegarLoop]: Abstraction has 144 states and 371 transitions. [2021-06-05 13:30:09,399 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:30:09,399 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 371 transitions. [2021-06-05 13:30:09,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:30:09,400 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:30:09,400 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:30:09,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-06-05 13:30:09,400 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:30:09,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:30:09,400 INFO L82 PathProgramCache]: Analyzing trace with hash 601862097, now seen corresponding path program 13 times [2021-06-05 13:30:09,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:30:09,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873230428] [2021-06-05 13:30:09,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:30:09,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:30:09,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:30:09,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:30:09,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873230428] [2021-06-05 13:30:09,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873230428] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:30:09,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:30:09,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 13:30:09,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441537766] [2021-06-05 13:30:09,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 13:30:09,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:30:09,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 13:30:09,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 13:30:09,445 INFO L87 Difference]: Start difference. First operand 144 states and 371 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:30:09,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:30:09,474 INFO L93 Difference]: Finished difference Result 261 states and 622 transitions. [2021-06-05 13:30:09,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 13:30:09,474 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 13:30:09,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:30:09,475 INFO L225 Difference]: With dead ends: 261 [2021-06-05 13:30:09,475 INFO L226 Difference]: Without dead ends: 222 [2021-06-05 13:30:09,475 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 40.3ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:30:09,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-06-05 13:30:09,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 144. [2021-06-05 13:30:09,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.5664335664335662) internal successors, (367), 143 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:30:09,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 367 transitions. [2021-06-05 13:30:09,479 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 367 transitions. Word has length 17 [2021-06-05 13:30:09,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:30:09,479 INFO L482 AbstractCegarLoop]: Abstraction has 144 states and 367 transitions. [2021-06-05 13:30:09,479 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:30:09,479 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 367 transitions. [2021-06-05 13:30:09,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:30:09,480 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:30:09,480 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:30:09,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-06-05 13:30:09,480 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:30:09,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:30:09,480 INFO L82 PathProgramCache]: Analyzing trace with hash -416081967, now seen corresponding path program 14 times [2021-06-05 13:30:09,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:30:09,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667235759] [2021-06-05 13:30:09,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:30:09,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:30:09,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:30:09,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:30:09,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667235759] [2021-06-05 13:30:09,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667235759] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:30:09,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:30:09,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 13:30:09,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506820588] [2021-06-05 13:30:09,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 13:30:09,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:30:09,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 13:30:09,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 13:30:09,532 INFO L87 Difference]: Start difference. First operand 144 states and 367 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:30:09,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:30:09,568 INFO L93 Difference]: Finished difference Result 267 states and 635 transitions. [2021-06-05 13:30:09,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 13:30:09,568 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 13:30:09,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:30:09,569 INFO L225 Difference]: With dead ends: 267 [2021-06-05 13:30:09,569 INFO L226 Difference]: Without dead ends: 218 [2021-06-05 13:30:09,570 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 48.0ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:30:09,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-06-05 13:30:09,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 140. [2021-06-05 13:30:09,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 2.568345323741007) internal successors, (357), 139 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:30:09,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 357 transitions. [2021-06-05 13:30:09,573 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 357 transitions. Word has length 17 [2021-06-05 13:30:09,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:30:09,573 INFO L482 AbstractCegarLoop]: Abstraction has 140 states and 357 transitions. [2021-06-05 13:30:09,573 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:30:09,573 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 357 transitions. [2021-06-05 13:30:09,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:30:09,573 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:30:09,574 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:30:09,574 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-06-05 13:30:09,574 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:30:09,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:30:09,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1441474897, now seen corresponding path program 15 times [2021-06-05 13:30:09,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:30:09,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748201775] [2021-06-05 13:30:09,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:30:09,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:30:09,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:30:09,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:30:09,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748201775] [2021-06-05 13:30:09,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748201775] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:30:09,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:30:09,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 13:30:09,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799610448] [2021-06-05 13:30:09,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 13:30:09,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:30:09,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 13:30:09,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 13:30:09,620 INFO L87 Difference]: Start difference. First operand 140 states and 357 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:30:09,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:30:09,643 INFO L93 Difference]: Finished difference Result 247 states and 583 transitions. [2021-06-05 13:30:09,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 13:30:09,643 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 13:30:09,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:30:09,644 INFO L225 Difference]: With dead ends: 247 [2021-06-05 13:30:09,644 INFO L226 Difference]: Without dead ends: 208 [2021-06-05 13:30:09,644 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 38.8ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:30:09,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-06-05 13:30:09,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 132. [2021-06-05 13:30:09,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.5419847328244276) internal successors, (333), 131 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:30:09,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 333 transitions. [2021-06-05 13:30:09,647 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 333 transitions. Word has length 17 [2021-06-05 13:30:09,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:30:09,647 INFO L482 AbstractCegarLoop]: Abstraction has 132 states and 333 transitions. [2021-06-05 13:30:09,647 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:30:09,647 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 333 transitions. [2021-06-05 13:30:09,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:30:09,647 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:30:09,647 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:30:09,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-06-05 13:30:09,648 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:30:09,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:30:09,648 INFO L82 PathProgramCache]: Analyzing trace with hash -422512687, now seen corresponding path program 16 times [2021-06-05 13:30:09,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:30:09,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741914317] [2021-06-05 13:30:09,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:30:09,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:30:09,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:30:09,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:30:09,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741914317] [2021-06-05 13:30:09,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741914317] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:30:09,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:30:09,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 13:30:09,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373746765] [2021-06-05 13:30:09,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 13:30:09,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:30:09,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 13:30:09,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 13:30:09,696 INFO L87 Difference]: Start difference. First operand 132 states and 333 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:30:09,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:30:09,733 INFO L93 Difference]: Finished difference Result 219 states and 526 transitions. [2021-06-05 13:30:09,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 13:30:09,734 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 13:30:09,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:30:09,735 INFO L225 Difference]: With dead ends: 219 [2021-06-05 13:30:09,735 INFO L226 Difference]: Without dead ends: 172 [2021-06-05 13:30:09,735 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 45.3ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:30:09,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-06-05 13:30:09,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 128. [2021-06-05 13:30:09,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.543307086614173) internal successors, (323), 127 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:30:09,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 323 transitions. [2021-06-05 13:30:09,748 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 323 transitions. Word has length 17 [2021-06-05 13:30:09,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:30:09,748 INFO L482 AbstractCegarLoop]: Abstraction has 128 states and 323 transitions. [2021-06-05 13:30:09,748 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:30:09,748 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 323 transitions. [2021-06-05 13:30:09,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:30:09,749 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:30:09,749 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:30:09,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-06-05 13:30:09,749 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:30:09,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:30:09,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1264414673, now seen corresponding path program 17 times [2021-06-05 13:30:09,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:30:09,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564027085] [2021-06-05 13:30:09,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:30:09,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:30:09,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:30:09,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:30:09,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564027085] [2021-06-05 13:30:09,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564027085] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:30:09,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:30:09,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 13:30:09,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927690666] [2021-06-05 13:30:09,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 13:30:09,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:30:09,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 13:30:09,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 13:30:09,804 INFO L87 Difference]: Start difference. First operand 128 states and 323 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:30:09,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:30:09,836 INFO L93 Difference]: Finished difference Result 223 states and 540 transitions. [2021-06-05 13:30:09,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 13:30:09,836 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 13:30:09,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:30:09,837 INFO L225 Difference]: With dead ends: 223 [2021-06-05 13:30:09,837 INFO L226 Difference]: Without dead ends: 178 [2021-06-05 13:30:09,837 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 49.6ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:30:09,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-06-05 13:30:09,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 134. [2021-06-05 13:30:09,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.526315789473684) internal successors, (336), 133 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:30:09,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 336 transitions. [2021-06-05 13:30:09,840 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 336 transitions. Word has length 17 [2021-06-05 13:30:09,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:30:09,841 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 336 transitions. [2021-06-05 13:30:09,841 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:30:09,841 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 336 transitions. [2021-06-05 13:30:09,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:30:09,841 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:30:09,841 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:30:09,842 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-06-05 13:30:09,842 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:30:09,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:30:09,842 INFO L82 PathProgramCache]: Analyzing trace with hash 936031791, now seen corresponding path program 18 times [2021-06-05 13:30:09,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:30:09,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781497069] [2021-06-05 13:30:09,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:30:09,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:30:09,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:30:09,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:30:09,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781497069] [2021-06-05 13:30:09,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781497069] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:30:09,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:30:09,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 13:30:09,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579016056] [2021-06-05 13:30:09,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 13:30:09,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:30:09,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 13:30:09,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 13:30:09,893 INFO L87 Difference]: Start difference. First operand 134 states and 336 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:30:09,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:30:09,918 INFO L93 Difference]: Finished difference Result 177 states and 432 transitions. [2021-06-05 13:30:09,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 13:30:09,918 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 13:30:09,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:30:09,919 INFO L225 Difference]: With dead ends: 177 [2021-06-05 13:30:09,919 INFO L226 Difference]: Without dead ends: 126 [2021-06-05 13:30:09,919 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 44.9ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:30:09,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-06-05 13:30:09,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2021-06-05 13:30:09,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.552) internal successors, (319), 125 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:30:09,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 319 transitions. [2021-06-05 13:30:09,921 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 319 transitions. Word has length 17 [2021-06-05 13:30:09,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:30:09,921 INFO L482 AbstractCegarLoop]: Abstraction has 126 states and 319 transitions. [2021-06-05 13:30:09,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:30:09,921 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 319 transitions. [2021-06-05 13:30:09,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:30:09,922 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:30:09,922 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:30:09,922 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-06-05 13:30:09,922 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:30:09,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:30:09,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1679709363, now seen corresponding path program 19 times [2021-06-05 13:30:09,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:30:09,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950689754] [2021-06-05 13:30:09,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:30:09,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:30:09,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:30:09,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:30:09,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950689754] [2021-06-05 13:30:09,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950689754] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:30:09,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:30:09,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 13:30:09,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090116409] [2021-06-05 13:30:09,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 13:30:09,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:30:09,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 13:30:09,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 13:30:09,974 INFO L87 Difference]: Start difference. First operand 126 states and 319 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:30:09,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:30:09,996 INFO L93 Difference]: Finished difference Result 212 states and 507 transitions. [2021-06-05 13:30:09,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 13:30:09,997 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 13:30:09,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:30:09,997 INFO L225 Difference]: With dead ends: 212 [2021-06-05 13:30:09,997 INFO L226 Difference]: Without dead ends: 158 [2021-06-05 13:30:09,997 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 40.8ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:30:09,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-06-05 13:30:09,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 126. [2021-06-05 13:30:10,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.464) internal successors, (308), 125 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:30:10,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 308 transitions. [2021-06-05 13:30:10,000 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 308 transitions. Word has length 17 [2021-06-05 13:30:10,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:30:10,000 INFO L482 AbstractCegarLoop]: Abstraction has 126 states and 308 transitions. [2021-06-05 13:30:10,000 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:30:10,001 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 308 transitions. [2021-06-05 13:30:10,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:30:10,002 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:30:10,002 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:30:10,002 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-06-05 13:30:10,003 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:30:10,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:30:10,003 INFO L82 PathProgramCache]: Analyzing trace with hash 1351326481, now seen corresponding path program 20 times [2021-06-05 13:30:10,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:30:10,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497242252] [2021-06-05 13:30:10,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:30:10,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:30:10,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:30:10,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:30:10,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497242252] [2021-06-05 13:30:10,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497242252] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:30:10,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:30:10,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 13:30:10,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308494572] [2021-06-05 13:30:10,059 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 13:30:10,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:30:10,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 13:30:10,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 13:30:10,060 INFO L87 Difference]: Start difference. First operand 126 states and 308 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:30:10,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:30:10,087 INFO L93 Difference]: Finished difference Result 203 states and 474 transitions. [2021-06-05 13:30:10,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 13:30:10,087 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 13:30:10,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:30:10,088 INFO L225 Difference]: With dead ends: 203 [2021-06-05 13:30:10,088 INFO L226 Difference]: Without dead ends: 143 [2021-06-05 13:30:10,088 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 44.2ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:30:10,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-06-05 13:30:10,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 111. [2021-06-05 13:30:10,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.4545454545454546) internal successors, (270), 110 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:30:10,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 270 transitions. [2021-06-05 13:30:10,091 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 270 transitions. Word has length 17 [2021-06-05 13:30:10,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:30:10,091 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 270 transitions. [2021-06-05 13:30:10,091 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:30:10,091 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 270 transitions. [2021-06-05 13:30:10,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:30:10,091 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:30:10,091 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:30:10,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-06-05 13:30:10,092 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:30:10,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:30:10,092 INFO L82 PathProgramCache]: Analyzing trace with hash -363627631, now seen corresponding path program 21 times [2021-06-05 13:30:10,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:30:10,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650435092] [2021-06-05 13:30:10,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:30:10,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:30:10,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:30:10,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:30:10,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650435092] [2021-06-05 13:30:10,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650435092] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:30:10,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:30:10,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 13:30:10,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743637786] [2021-06-05 13:30:10,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 13:30:10,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:30:10,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 13:30:10,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 13:30:10,141 INFO L87 Difference]: Start difference. First operand 111 states and 270 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:30:10,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:30:10,168 INFO L93 Difference]: Finished difference Result 174 states and 399 transitions. [2021-06-05 13:30:10,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 13:30:10,168 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 13:30:10,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:30:10,169 INFO L225 Difference]: With dead ends: 174 [2021-06-05 13:30:10,169 INFO L226 Difference]: Without dead ends: 120 [2021-06-05 13:30:10,169 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 39.4ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:30:10,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-06-05 13:30:10,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 88. [2021-06-05 13:30:10,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 2.310344827586207) internal successors, (201), 87 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:30:10,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 201 transitions. [2021-06-05 13:30:10,171 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 201 transitions. Word has length 17 [2021-06-05 13:30:10,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:30:10,171 INFO L482 AbstractCegarLoop]: Abstraction has 88 states and 201 transitions. [2021-06-05 13:30:10,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:30:10,171 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 201 transitions. [2021-06-05 13:30:10,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:30:10,172 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:30:10,172 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:30:10,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-06-05 13:30:10,172 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:30:10,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:30:10,172 INFO L82 PathProgramCache]: Analyzing trace with hash -1855122543, now seen corresponding path program 22 times [2021-06-05 13:30:10,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:30:10,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960731304] [2021-06-05 13:30:10,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:30:10,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:30:10,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:30:10,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:30:10,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960731304] [2021-06-05 13:30:10,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960731304] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:30:10,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:30:10,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 13:30:10,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819023170] [2021-06-05 13:30:10,257 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 13:30:10,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:30:10,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 13:30:10,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 13:30:10,257 INFO L87 Difference]: Start difference. First operand 88 states and 201 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:30:10,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:30:10,289 INFO L93 Difference]: Finished difference Result 131 states and 297 transitions. [2021-06-05 13:30:10,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 13:30:10,289 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 13:30:10,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:30:10,290 INFO L225 Difference]: With dead ends: 131 [2021-06-05 13:30:10,290 INFO L226 Difference]: Without dead ends: 78 [2021-06-05 13:30:10,290 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 72.2ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:30:10,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-06-05 13:30:10,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-06-05 13:30:10,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.272727272727273) internal successors, (175), 77 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:30:10,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 175 transitions. [2021-06-05 13:30:10,292 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 175 transitions. Word has length 17 [2021-06-05 13:30:10,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:30:10,292 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 175 transitions. [2021-06-05 13:30:10,292 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:30:10,292 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 175 transitions. [2021-06-05 13:30:10,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:30:10,292 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:30:10,292 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:30:10,293 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-06-05 13:30:10,293 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:30:10,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:30:10,293 INFO L82 PathProgramCache]: Analyzing trace with hash -40818065, now seen corresponding path program 23 times [2021-06-05 13:30:10,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:30:10,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052596121] [2021-06-05 13:30:10,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:30:10,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:30:10,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:30:10,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:30:10,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052596121] [2021-06-05 13:30:10,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052596121] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:30:10,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:30:10,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 13:30:10,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096181638] [2021-06-05 13:30:10,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 13:30:10,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:30:10,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 13:30:10,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 13:30:10,338 INFO L87 Difference]: Start difference. First operand 78 states and 175 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:30:10,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:30:10,368 INFO L93 Difference]: Finished difference Result 109 states and 239 transitions. [2021-06-05 13:30:10,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 13:30:10,368 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 13:30:10,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:30:10,369 INFO L225 Difference]: With dead ends: 109 [2021-06-05 13:30:10,369 INFO L226 Difference]: Without dead ends: 64 [2021-06-05 13:30:10,369 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 50.3ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:30:10,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-06-05 13:30:10,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-06-05 13:30:10,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.0952380952380953) internal successors, (132), 63 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:30:10,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 132 transitions. [2021-06-05 13:30:10,370 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 132 transitions. Word has length 17 [2021-06-05 13:30:10,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:30:10,370 INFO L482 AbstractCegarLoop]: Abstraction has 64 states and 132 transitions. [2021-06-05 13:30:10,370 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:30:10,371 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 132 transitions. [2021-06-05 13:30:10,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:30:10,371 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:30:10,371 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:30:10,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-06-05 13:30:10,371 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:30:10,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:30:10,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1630752815, now seen corresponding path program 24 times [2021-06-05 13:30:10,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:30:10,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448509375] [2021-06-05 13:30:10,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:30:10,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:30:10,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:30:10,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:30:10,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448509375] [2021-06-05 13:30:10,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448509375] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:30:10,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:30:10,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 13:30:10,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767059680] [2021-06-05 13:30:10,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 13:30:10,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:30:10,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 13:30:10,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 13:30:10,417 INFO L87 Difference]: Start difference. First operand 64 states and 132 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:30:10,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:30:10,440 INFO L93 Difference]: Finished difference Result 63 states and 131 transitions. [2021-06-05 13:30:10,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 13:30:10,440 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 13:30:10,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:30:10,441 INFO L225 Difference]: With dead ends: 63 [2021-06-05 13:30:10,441 INFO L226 Difference]: Without dead ends: 0 [2021-06-05 13:30:10,441 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 49.4ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:30:10,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-05 13:30:10,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-05 13:30:10,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:30:10,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-05 13:30:10,441 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 17 [2021-06-05 13:30:10,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:30:10,441 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-05 13:30:10,441 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:30:10,442 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-05 13:30:10,442 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-05 13:30:10,442 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-06-05 13:30:10,443 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 13:30:10,445 INFO L202 PluginConnector]: Adding new model example_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 01:30:10 BasicIcfg [2021-06-05 13:30:10,445 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 13:30:10,445 INFO L168 Benchmark]: Toolchain (without parser) took 3467.51 ms. Allocated memory was 362.8 MB in the beginning and 436.2 MB in the end (delta: 73.4 MB). Free memory was 342.1 MB in the beginning and 361.4 MB in the end (delta: -19.3 MB). Peak memory consumption was 54.4 MB. Max. memory is 16.0 GB. [2021-06-05 13:30:10,445 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 362.8 MB. Free memory is still 343.1 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 13:30:10,445 INFO L168 Benchmark]: Boogie Procedure Inliner took 21.24 ms. Allocated memory is still 362.8 MB. Free memory was 342.1 MB in the beginning and 340.6 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 13:30:10,446 INFO L168 Benchmark]: Boogie Preprocessor took 11.09 ms. Allocated memory is still 362.8 MB. Free memory was 340.6 MB in the beginning and 339.7 MB in the end (delta: 849.5 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 13:30:10,446 INFO L168 Benchmark]: RCFGBuilder took 221.53 ms. Allocated memory is still 362.8 MB. Free memory was 339.6 MB in the beginning and 330.4 MB in the end (delta: 9.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. [2021-06-05 13:30:10,446 INFO L168 Benchmark]: TraceAbstraction took 3208.92 ms. Allocated memory was 362.8 MB in the beginning and 436.2 MB in the end (delta: 73.4 MB). Free memory was 329.9 MB in the beginning and 361.4 MB in the end (delta: -31.5 MB). Peak memory consumption was 44.0 MB. Max. memory is 16.0 GB. [2021-06-05 13:30:10,446 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 362.8 MB. Free memory is still 343.1 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 21.24 ms. Allocated memory is still 362.8 MB. Free memory was 342.1 MB in the beginning and 340.6 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 11.09 ms. Allocated memory is still 362.8 MB. Free memory was 340.6 MB in the beginning and 339.7 MB in the end (delta: 849.5 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 221.53 ms. Allocated memory is still 362.8 MB. Free memory was 339.6 MB in the beginning and 330.4 MB in the end (delta: 9.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. * TraceAbstraction took 3208.92 ms. Allocated memory was 362.8 MB in the beginning and 436.2 MB in the end (delta: 73.4 MB). Free memory was 329.9 MB in the beginning and 361.4 MB in the end (delta: -31.5 MB). Peak memory consumption was 44.0 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 21]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 9 procedures, 40 locations, 5 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3087.6ms, OverallIterations: 27, TraceHistogramMax: 1, EmptinessCheckTime: 27.9ms, AutomataDifference: 972.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 65.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1010 SDtfs, 1212 SDslu, 1379 SDs, 0 SdLazy, 327 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 267.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 153 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1275.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=299occurred in iteration=0, InterpolantAutomatonStates: 153, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 169.1ms AutomataMinimizationTime, 27 MinimizatonAttempts, 1410 StatesRemovedByMinimization, 20 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 25.4ms SsaConstructionTime, 70.9ms SatisfiabilityAnalysisTime, 1548.2ms InterpolantComputationTime, 459 NumberOfCodeBlocks, 459 NumberOfCodeBlocksAsserted, 27 NumberOfCheckSat, 432 ConstructedInterpolants, 0 QuantifiedInterpolants, 6156 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 27 InterpolantComputations, 27 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...